CN201649093U - Long spiral dual-pipe high-pressure stirring-spraying pile construction device - Google Patents
Long spiral dual-pipe high-pressure stirring-spraying pile construction device Download PDFInfo
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- CN201649093U CN201649093U CN2009201101875U CN200920110187U CN201649093U CN 201649093 U CN201649093 U CN 201649093U CN 2009201101875 U CN2009201101875 U CN 2009201101875U CN 200920110187 U CN200920110187 U CN 200920110187U CN 201649093 U CN201649093 U CN 201649093U
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Abstract
The utility model relates to a long spiral dual-pipe high-pressure stirring-spraying pile construction device comprising a hollow drill stem, a high-pressure mortar transporting pipe, a high-pressure water tube, a stirring blade, a dual-pipe rotary-spraying stirring drill, a dual-pipe rotary slip casting joint, a cement paste transporting pipe, a high-pressure water delivery pipe, a high-pressure cement slip casting pump, a high-pressure water pump and the like. Compared with the traditional stirring pile and the rotary-spraying pile, the device can be applicable for soft soil, loose and slightly dense sandy soil as well as all kinds of soil layers such as stiff clay, sandy gravel, humus and the like, and has especially prominent effect in the sandy gravel layer.
Description
Technical field:
The utility model relates to a kind of novel high-pressure injection stirring concrete earth pile construction equipment in the construction work, be mainly used in water-stop curtain and foundation treatment engineering, be applicable in various soil layers and construct, especially in stratum such as humus soil, stiff clay, sand and crushed stone soil layer, have more superiority.
Background technology:
Though waterproof of man technology and equipment thereof based on common rotary churning pile and agitation pile formation have been widely used in foundation ditch sealing engineering, but since its humus soil, stiff clay, in the restriction that is subjected in dense real sandy soil and the pebble layer, be fixed up, spray motionless or problem such as institute's pile is upper coarse and lower fine, crotch is worn in adjacent stake or quality is inhomogeneous as existence, thereby make the waterproof of man stake have drainage to take place.
And the novel rotary churning pile that forms based on long-spiral drilling machine in recent years or stir spray technique because there are following several respects in it, and is restricted it:
1, all adopts the substance pipe construction, expanded diameter is restricted, it is not fine adding the control of long-spiral drilling machine construction verticality, particularly in sand pebble layer, see that according to the effect of having excavated part curtain pile and slope protection pile pile body depart from bigger, thereby form leak gap in the same way, the curtain water stop effect is not very desirable, and drainage takes place more;
2, rig lifting or running speed and churning speed do not match in the churning process, and hoisting velocity is too fast, and forms the shape of threads curtain pile easily, and the screw thread of connection should form leak paths;
Though by adjust assembly pulley make rig creep into or hoisting velocity controlled, one is because to improve the rear wheel group too much, comes off easily, the back that comes off is long maintenance time, should cause underground drilling accident; The 2nd, make long-spiral drilling machine function singlenessization (carrying out jet grouting pile construction only), other rig of still needing assists to draw the hole, and efficiency of construction is low, causes the wasting of resources, and construction cost is higher.
The utility model content:
The utility model has following advantage with respect to prior art, and the one, make expanded diameter obviously enlarge, its expanded diameter is 1.3～2.5 times that technology is stirred in existing substance pipe range spiral spray, particularly the construction effect in hard formations such as sandy gravel is more obvious; The 2nd, adopt special-purpose speed-adjusting and control system to control, switch lifting, the rate of penetration of rig, give full play to long-spiral drilling machine and double pipe technology advantage separately, thereby finally made long-spiral drilling machine double pipe high-pressure injection agitation pile technology can be applied even more extensively in water-stop curtain and Foundation Treatment.The 3rd, simplified work progress, make pore-creating unite two into one with spraying grouting with plunger, reduced construction cost, improved effect.
The high-pressure injection agitation pile that the utility model is mentioned can form compound water-stop curtain with slope protection pile, and also the churning interlock forms colonnade formula curtain separately, but also churning combines formation post wall formula curtain with fixed spray, can be used for ground simultaneously and handle and stabilization works.This technology may further comprise the steps:
1) according to designing requirement, determine the position of each, when forming compound curtain with slope protection pile, stake stake position is stirred in spray can be offset 100～200mm from adjacent two slope protection pile axis outside foundation ditch, press the construction of construction technology shown in the accompanying drawing one pile then;
2) will reequip and long-spiral drilling machine that device has double pipe high pressure spray to stir system is aimed at the drill center that foundation soil is arranged, rotary drilling on one side, the current of high-pressure injection on one side, be to cut the soil body with High-Pressure Water while creeping into, and carry out water and soil and stir, form mud off, in case of necessity, cement paste capable of simultaneous injection is until projected depth.In drilling process, can not carry out the injection of water and cement paste as required yet but directly creep into.
3) adjust drilling rod position and direction, start water under high pressure mud and high-pressure hydraulic pump, promote drilling tool, in lifting process, adopt churning or fixed spray or pendulum spray technique, until pile.
4) repetition 2), 3) step is until satisfying construction process requirement.
Pile in the wherein said step 1) can be that ground is handled stake, slope protection pile or waterproof of man stake.It is characterized in that adopting the job practices of high-pressure rotary-spray that the long-spiral drilling machine after the repacking combines with the double pipe technology or fixed spray or pendulum spray, stirring concrete earth pile.
When the pile in the described step 1) was used for the waterproof of man stake, the formation waterproof of man can combine with plate brad supporting, pile-anchor retaining.100mm to 300mm is cut in this stake continuously and mutually when combining with plate brad supporting; When combining with pile-anchor retaining between every adjacent two slope protection pile long spiral double pipe high pressure spray of construction stir stake and with the tangent 100mm to 300mm of slope protection pile.
Described step 2) construction equipment of being mentioned in is by the long-spiral drilling machine after the repacking, stir the spray of slurry system, double pipe high pressure and stir system's three parts and form.Wherein the long-spiral drilling machine after the repacking is characterized in that effectively being switched in pore-forming and two processes of churning by the rig of change control system control, can make rig promote rate of penetration and switch fast about 3.0m/min and between 1.2～1.5m/min or the 0.2m/min.
Described step 2) the double pipe high pressure spray system of stirring comprises hollow drill pipe, high pressure feed pipe for mortar, high-pressure water pipe, stirring vane, double pipe rotary jet stirring drill bit, double pipe rotation filling adaptor, cement paste carrier pipe, water under high pressure carrier pipe, high pressure cement grouting pump, high-pressure hydraulic pump etc. in.
Its feature is as follows: hollow drill pipe is fixed on the long-spiral drilling machine unit head by the double pipe rotation filling adaptor that is connected in its top, in hollow drill pipe, adhere to high pressure feed pipe for mortar and high-pressure water pipe, its bottom is connected with the double pipe rotary jet stirring drill bit that is fixed on the hollow drill pipe end, the top rotates filling adaptor by double pipe, be connected with cement paste carrier pipe, high pressure cement grouting pump on the one hand, be connected with water under high pressure carrier pipe, high-pressure hydraulic pump on the other hand.
Two groups of nozzles up and down are equipped with in double pipe rotary jet stirring drill bit side: its upper nozzle is used for the inject high pressure current, lower nozzle is used for the inject high pressure cement paste, the arrangement of nozzles form can adopt " K " font, " X " shape or " one " font layout etc., drill bit bottom and side are welded with stirring vane.
Described step 2) hollow drill pipe that construction equipment adopts in can adopt the on-bladed drilling rod, also can adopt long screw drill rod.
Described step 2) formation of pile in, its feature is as follows:
Rig is when drilling and forming hole, current by high-pressure hydraulic pump pressurization after water under high pressure carrier pipe, double pipe rotation filling adaptor, the high-pressure water pipe in being attached to hollow drill pipe is to the high-pressure water shot flow nozzle on double pipe rotary jet stirring drill bit top again, to be not less than the pressure ejection of 15MPa, be used to cut the soil body, the soil body and water under stirring vane will cut stirs the formation mud off simultaneously, until pore-forming.In this process, following two kinds of selections can be arranged also: the one, not water filling in the drilling process and directly creeping into; The 2nd, limit high pressure water injection marginal not slurry is specifically selected according to construction requirement in the drilling process.
When rig carries out churning or sprays surely at the lifting drilling tool, regulate hoisting velocity to 1.2～1.5m/min or slower speed by change control system, start high pressure cement grouting pump and high-pressure hydraulic pump simultaneously, current after pressurizeing by passage as mentioned above with the pressure ejection that is not less than 15MPa with the cutting soil body; Simultaneously cement paste by the pressurization of high pressure cement grouting pump after cement paste carrier pipe, double pipe rotation filling adaptor, again the high pressure feed pipe for mortar in being attached to hollow drill pipe to the water under high pressure mud nozzle of double pipe rotary jet stirring drill bit bottom to be not less than the pressure ejection of 15MPa.Under the acting in conjunction of high pressure slurry stream and High-Pressure Water, the energy that destroys the soil body enlarges markedly, and when nozzle simultaneously rotates and lifting or rig, by stirring vane the soil body and slurries is stirred simultaneously, thereby makes the diameter of induration obviously increase.
Employed cement paste is characterized in that water/binder ratio 1.0～1.8 in the described step 3).
Described step 3) is characterized in that adopting corresponding strengthening measure at different geological conditionss and hydrologic condition.In case of necessity, can need carry out multiple spray at the big soil layer of water content such as sandy gravel, to guarantee construction quality.
Described step 3) also can be according to construction requirement, with the mode cement injection of the normal pressure that is lower than 15MPa.
Adopting the long-spiral drilling machine after reequiping in the utility model is construction machinery, adopts double pipe high pressure jet grouting stirring technique, and its beneficial effect is as follows:
1, traditional relatively agitation pile and rotary churning pile, it is not only applicable to weak soil, loose～close slightly sandy soil, also is applicable to all kinds of soil layers such as stiff clay, sandy gravel, humus soil, and especially effect is more outstanding in sand pebble layer;
2, spray technique is stirred or stirs in existing relatively substance pipe range spiral spray, owing to adopt double pipe high pressure jet grouting stirring technique, make expanded diameter obviously enlarge, its expanded diameter is 1.3～2.5 times of substance Manifold technology, particularly at sandy gravel, the expansion of its spray regime has slowed down greatly because of spray and has stirred the water stopping curtain seepage problem that the pile verticality deviation causes too greatly.
3, adopt special-purpose speed-adjusting and control system to control, switch lifting, the rate of penetration of rig, give full play to long-spiral drilling machine and double pipe technology advantage separately, thereby finally made long-spiral drilling machine double pipe high-pressure injection agitation pile technology more extensively to obtain being applied in water-stop curtain and the Foundation Treatment.
4, work progress has saved the link of drawing the hole, make pore-creating with spray that grouting with plunger is continual to unite two into one, reduced construction cost, improved effect.
Description of drawings:
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model is described in further detail, wherein:
Fig. 1 is that the pile constructing process flow chart is stirred in long spiral double pipe high pressure spray;
Fig. 2 is the structural representation that the pile driving construction device is stirred in long spiral double pipe high pressure spray;
Fig. 3 is the sectional view of double pipe rotary jet stirring drill bit among Fig. 2;
Fig. 4 is the sectional view that the annexation of hollow drill pipe in the pile driving construction device and high pressure feed pipe for mortar, high-pressure water pipe is stirred in the spray of long spiral double pipe high pressure.
1 change control system, 2 hollow drill pipes, 3 high pressure feed pipe for mortar, 4 high-pressure water pipe, 5 stirring vanes, 6 double pipe rotary jet stirring drill bits, 7 double pipes rotation filling adaptor, 8 cement paste carrier pipes, 9 water under high pressure carrier pipes, 10 high pressure cement grouting pumps, 11 high-pressure hydraulic pumps, 12 long-spiral drilling machine unit heads, 13 nozzles.
The specific embodiment:
The utility model is not subjected to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
Long as shown in the figure spiral double pipe high pressure spray mixing pile construction equipment is by the long-spiral drilling machine after the repacking, stir the spray of slurry system, double pipe high pressure and stir system's three parts and form.
Wherein on the long-spiral drilling machine after the repacking change control system control (1) is housed, make rig in pore-forming and two processes of churning, effectively to switch, can make rig promote rate of penetration between 3.0m/min and 1.2～1.5m/min or 0.2m/min switch fast.
The double pipe high pressure spray system of stirring comprises hollow drill pipe (2), high pressure feed pipe for mortar (3), high-pressure water pipe (4), stirring vane (5), double pipe rotary jet stirring drill bit (6), double pipe rotation filling adaptor (7), cement paste carrier pipe (8), water under high pressure carrier pipe (9), high pressure cement grouting pump (10), high-pressure hydraulic pump (11) etc.Wherein hollow drill pipe (2) is fixed on the long-spiral drilling machine unit head (12) by the double pipe rotation filling adaptor (7) that is connected in its top, in hollow drill pipe (2), adhere to high pressure feed pipe for mortar (3) and high-pressure water pipe (4), its bottom is connected with the double pipe rotary jet stirring drill bit (6) that is fixed on hollow drill pipe (2) end, the top rotates filling adaptor (7) by double pipe, be connected with cement paste carrier pipe (8), high pressure cement grouting pump (10) on the one hand, be connected with water under high pressure carrier pipe (9), high-pressure hydraulic pump (11) on the other hand.Two groups of nozzles (13) up and down are equipped with in double pipe rotary jet stirring drill bit (6) side: its upper nozzle is used for the inject high pressure current, lower nozzle is used for the inject high pressure cement paste, the arrangement of nozzles form can adopt " K " font, " X " shape or " one " font layout etc., and drill bit bottom and side are welded with stirring vane (5).Hollow drill pipe (2) can adopt the on-bladed drilling rod, also can adopt long screw drill rod.
Fig. 1 is long spiral double pipe high pressure spray mixing pile construction technology figure, and according to this technology, its construction sequence is as follows:
1) according to designing requirement, determine the position of each, when forming compound curtain with slope protection pile, stake stake position is stirred in spray can be offset 100～200mm from adjacent two slope protection pile axis outside foundation ditch, press the construction of construction technology shown in the accompanying drawing 1 pile then;
2) will reequip and long-spiral drilling machine that device has double pipe high pressure spray to stir system is aimed at the drill center that foundation soil is arranged, rotary drilling on one side, the current of high-pressure injection on one side, be to cut the soil body with High-Pressure Water while creeping into, and carry out water and soil and stir, form mud off, in case of necessity, but gunite is until projected depth.
3) adjust drilling rod position and direction, start water under high pressure mud and high-pressure hydraulic pump, promote drilling tool, in lifting process, adopt churning or fixed spray or pendulum spray technique, until pile.
The construction case: certain engineering is a raft foundation, embedded depth of foundation 7.0m.Its geological conditions is:
1, topography and geomorphology
Plan to build the place and be positioned at Wenyu River alluvial-proluvial fan middle part on landforms, the Quaternary Period, formation thickness was greater than 50 meters.The landform substantially flat, drilling orifice place ground level is 40.49～40.67m, 0.18 meter of the discrepancy in elevation.
2, formation lithology
Analysis-by-synthesis according to the on-the-spot probing of surveying unit and in-situ test and laboratory soil test achievement, the soil layer that is distributed in the maximum depth of exploration scope can be divided into artificial accumulation horizon and Quaternary deposit layer two big class by deposition age, genetic type, further be divided into 9 big layers by formation lithology and engineering properties, existing division is as follows:
Artificial accumulation horizon
Banket 1. 1. 1 layer of layer room dregs of the clay silt that this layer is distributed in artificial accumulations in the face of land (absolute altitude 38.87～40.67).
The Quaternary deposit layer
The heavy silty clay, silty clay that this layer is distributed in (absolute altitude 15.60～39.72) Quaternary deposit be 3. 3. 4. 4. 5. 6. 7. 8. 9. layer of layer silty clay of layer sandy silt of layer silty clay of layer medium sand of 1 layer of fine sand of the heavy silty clay of layer, silty clay of 1 layer of sandy silt, clay silt of layer silty clay of layer sandy silt, clay silt 2..
About distribution situation, Characteristics Summary and the soil test of above-mentioned soil layer and the comprehensive statistics result of in-situ test, see exploration report " engineering geological profile " and " the physico-mechanical properties comrehensive statistical table of formation lithology and soil " for details.
3, hydrogeological overview
Water-level observation material when reconnoitring, (on December 26,2008 on the 23rd December in 2008) two-layer underground water of actual measurement in boring during the prospecting, its rest position water yield is surveyed the result and is seen following table for details.
This place peak level fifties is once near the face of land, and bury of groundwater was about 3 meters in nearly 3～5 years.
The scheme of supporting precipitation is, because this engineering construction place backfill buried depth 3～5m, interlayer diving is abundant, and water recharging on every side is continuous, and supporting scheme adopts pile-anchor supporting system, and precipitation adopts curtain pile, arranges between stake.
It is the deposited reinforced concrete pile of φ 600mm that slope protection pile adopts the stake footpath, and pile spacing is 1200mm; Stake top design elevation is-1.55m that stake end design elevation is-10.55m the long 9.00m of stake, after cutting pile crown, the stake top is provided with steel concrete binding beam, binding beam top mark height-1.55m one, the binding beam cross dimensions is 600 * 400mm, slope protection pile, binding beam concrete strength C25.One row's prestressed anchor is set on the coupling beam, three one anchors, the long 15.0m of anchor pole, free section 5.0m, anchoring section 10.0m, lock value is 210KN, is locked on the binding beam, anchor rod body all adopts 2 φ, 15.2 steel strand (1860 grades).
The waterproof between piles curtain adopts long spiral double pipe spray mixing pile, and design parameters is as follows:
1) the long 9.0m of spray mixing pile stake, a stake top design elevation be-1.55m, an end design elevation is-10.55m, drilling diameter 400mm, rotary churning pile pile intended diameter is not less than 800mm, and pile spacing 1.2m is with the slope protection pile interlaced arrangement;
2) spray mixing pile adopts double pipe double high pressure rotary spray technique, and water filling, grouting pressure all are not less than 15Mpa;
3) the cement paste water/binder ratio is 1.5: 1, cement grade P.S.A32.5;
Concrete construction sequence: 1, measuring stake position: curtain pile carries out after slope protection pile construction, is the accuracy that guarantees curtain pile measuring stake position, in principle, should excavate the measuring of carrying out curtain pile stake position behind the slope protection pile pile crown again;
2, preparation of construction:
1) the long spiral after will reequiping stirs the spray rig and water under high pressure mud system, high pressure water system connect, and rig is in place;
2) cement paste stirs: with special-purpose agitator cement paste is stirred, the cement paste water/binder ratio is 1.5: 1, carries out scale on agitator, adds construction water according to the scale height; Add proportioning again and calculate the cement amount of gained (controlling by the bag number), adopt the high-speed stirred motor, mixing time guarantees more than the 2min.Be equipped with water butt and slurry storing tank simultaneously, to guarantee the needs of construction continuously;
3, boring: rig is in place, and speed-adjusting and control system is heightened shelves (3m/min), and drill bit sinks down into absolute altitude at the bottom of the design curtain, in the going down process, starts the high-pressure hydraulic pump system simultaneously and is forced into design pressure, and the limit churning is bored down on the limit;
4, pile: after being drilled into curtain design end absolute altitude down, speed-adjusting and control system is turned down shelves (1.2～1.5m/min), start high pressure cement stock pump (not closing high-pressure hydraulic pump), adopt again on the churning mode and carry drilling rod, to curtain design calibration height, commander backstage high-pressure pump stops the high pressure supply, gets final product pile.
Pile-forming effect: according to scene excavation situation, find that the curtain construction effect is more satisfactory for result than substance pipe, expanded diameter can reach 1200mm, is 2 times of substance pipe diameters, is connected tight between curtain pile and the slope protection pile, does not almost find the seepage phenomenon.
As seen, long spiral double pipe spray mixing pile is because expanded diameter is big, can effectively reduce long-spiral drilling machine and be used for the leakage problems that curtain when construction causes greatly because of perpendicularity deviation.And in this engineering, the long-spiral drilling machine with governing system can fully play effect, no longer utilizes other rig to draw the hole, and the more common drilling machine construction time shortens about 1/3～1/2, has greatly improved efficiency of construction.
In addition, in work progress, according to different geological conditions, can strengthen high-pressure injection to partial section selectively, can take to adjust expulsion pressure, adjust to promote subsidence velocity, adjust and spray reciprocal time, adjust nozzle diameter and adjust several different methods such as spray regime (churning or decide spray, pendulum spray) and carry out reasonable construction, to guarantee the effective overlap joint between water-stop curtain stake and the slope protection pile.
Claims (4)
1. one kind long spiral double pipe high pressure spray mixing pile construction equipment, it is characterized in that, this construction equipment is by long-spiral drilling machine, stir the slurry system, the spray of double pipe high pressure is stirred system's three parts and is formed, change control system (1) wherein is housed on the long-spiral drilling machine, the double pipe high pressure spray system of stirring comprises hollow drill pipe (2), high pressure feed pipe for mortar (3), high-pressure water pipe (4), stirring vane (5), double pipe rotary jet stirring drill bit (6), double pipe rotation filling adaptor (7), cement paste carrier pipe (8), water under high pressure carrier pipe (9), high pressure cement grouting pump (10), high-pressure hydraulic pump (11), wherein hollow drill pipe (2) is fixed on the long-spiral drilling machine unit head (12) by the double pipe rotation filling adaptor (7) that is connected in its top, in hollow drill pipe (2), adhere to high pressure feed pipe for mortar (3) and high-pressure water pipe (4), its bottom is connected with the double pipe rotary jet stirring drill bit (6) that is fixed on hollow drill pipe (2) end, the top rotates filling adaptor (7) by double pipe, on the one hand with cement paste carrier pipe (8), high pressure cement grouting pump (10) connects, on the other hand with water under high pressure carrier pipe (9), high-pressure hydraulic pump (11) connects, and drill bit bottom and side are welded with stirring vane (5).
2. construction equipment as claimed in claim 1 is characterized in that, two groups of nozzles (13) up and down are equipped with in double pipe rotary jet stirring drill bit (6) side, and its upper nozzle is used for the inject high pressure current, and lower nozzle is used for the inject high pressure cement paste.
3. construction equipment as claimed in claim 2 is characterized in that, the arrangement of nozzles form adopts " K " font, " X " shape or " one " font to arrange.
4. construction equipment as claimed in claim 1 or 2 is characterized in that, hollow drill pipe (2) adopts the on-bladed drilling rod or adopts long screw drill rod.
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| CN2009201101875U CN201649093U (en) | 2009-07-23 | 2009-07-23 | Long spiral dual-pipe high-pressure stirring-spraying pile construction device |
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| CN2009201101875U CN201649093U (en) | 2009-07-23 | 2009-07-23 | Long spiral dual-pipe high-pressure stirring-spraying pile construction device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296630A (en) * | 2011-06-17 | 2011-12-28 | 北京中岩大地工程技术有限公司 | Construction method of long-screw high-pressure mix jetting cement diaphragm wall |
| CN104329020A (en) * | 2014-10-14 | 2015-02-04 | 北京中岩大地工程技术有限公司 | Reinforced long-screw rock-socketed construction equipment and process thereof |
| CN107227736A (en) * | 2017-07-27 | 2017-10-03 | 江苏建院营造股份有限公司 | High-pressure rotary-spray stirs drilling rod, device and the construction method of bearing pile |
| CN108951725A (en) * | 2018-07-25 | 2018-12-07 | 上海同禾土木工程科技有限公司 | Mixing pile construction quality adaptation monitoring method and system based on technology of Internet of things |
| CN109826589A (en) * | 2018-12-29 | 2019-05-31 | 北京中岩大地科技股份有限公司 | A kind of confined space high-pressure mortar spraying method and system |
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2009
- 2009-07-23 CN CN2009201101875U patent/CN201649093U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296630A (en) * | 2011-06-17 | 2011-12-28 | 北京中岩大地工程技术有限公司 | Construction method of long-screw high-pressure mix jetting cement diaphragm wall |
| CN104329020A (en) * | 2014-10-14 | 2015-02-04 | 北京中岩大地工程技术有限公司 | Reinforced long-screw rock-socketed construction equipment and process thereof |
| CN107227736A (en) * | 2017-07-27 | 2017-10-03 | 江苏建院营造股份有限公司 | High-pressure rotary-spray stirs drilling rod, device and the construction method of bearing pile |
| CN108951725A (en) * | 2018-07-25 | 2018-12-07 | 上海同禾土木工程科技有限公司 | Mixing pile construction quality adaptation monitoring method and system based on technology of Internet of things |
| CN109826589A (en) * | 2018-12-29 | 2019-05-31 | 北京中岩大地科技股份有限公司 | A kind of confined space high-pressure mortar spraying method and system |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20101124 Termination date: 20120723 |